CN201260240Y - Loudspeaker with moving coil - Google Patents
Loudspeaker with moving coil Download PDFInfo
- Publication number
- CN201260240Y CN201260240Y CNU2008201889215U CN200820188921U CN201260240Y CN 201260240 Y CN201260240 Y CN 201260240Y CN U2008201889215 U CNU2008201889215 U CN U2008201889215U CN 200820188921 U CN200820188921 U CN 200820188921U CN 201260240 Y CN201260240 Y CN 201260240Y
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- CN
- China
- Prior art keywords
- ferrite sheet
- voice coil
- height
- magnetic conduction
- conduction post
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- Expired - Fee Related
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Abstract
The utility model relates to a moving-coil loudspeaker. The loudspeaker is composed of a T iron with a magnetic conduction post, magnetic steel, a sound coil, a bracket and a paper cone; wherein, a ferrite sheet is fixedly arranged on the magnetic conduction post of the T iron; the height h of the ferrite sheet is equal to or more than one third of the height H of the sound coil, the diameter d of the ferrite sheet is equal to or more than half of the diameter D of the magnetic conduction post and is equal to or less than the diameter D of the magnetic conduction post as well; the number of the ferrite sheet is one or more, the area sum of the ferrite sheet is equal to or more than half of the area of a transverse section of the magnetic conduction post and is equal to or less than the area of the transverse section of the magnetic conduction post as well; the height of the magnetic conduction post is less than that of the magnetic steel; besides, the height of the ferrite sheet is equal to that of the sound coil. By utilizing the moving-coil loudspeaker with the above structure to fixedly arrange the ferrite sheet on the magnetic conduction post of the T iron, the internal resistance of the entire dynamic vortex of the magnetic conduction post can be increased, thus reducing the generation of the vortex, strengthening the magnetic flux of the sound coil, greatly improving the working efficiency of the sound coil and reducing the distortion of the audio frequency.
Description
Technical field
A kind of moving-coil speaker is specifically related to a kind of improvement of loudspeaker apparatus structure.
Background technology
Loud speaker in the market, we are in the process of playing back music, and the voice coil loudspeaker voice coil in the loud speaker is to produce the magnetic field that changes along with music signal.Owing to produce eddy current in the T iron prop in the middle of electromagnetic induction principle, this magnetic field can make.Eddy current flows in iron prop and forms electrical piano power loss, makes loudspeaker enclosure descend.The interior resistance of iron prop is low more, and eddy current is just big more, and power loss is just high more.If the internal resistance of iron prop is improved, just eddy current can reduce, loudspeaker enclosure just can promote.According to conventional art, if make the change of iron prop material internal resistance improve, just can cause magnetic resistance to increase, magnetic flux just can reduce so.Under these circumstances, the magnetic field intensity in the magnetic gap that surrounds voice coil loudspeaker voice coil just can lower.Like this, loudspeaker enclosure just can reduce.Contradiction in this engineering design does not also have solution to now.
Eddy current in the T iron also can produce magnetic field simultaneously, and magnetic field that this magnetic field produces with voice coil loudspeaker voice coil is not homophase.Because there is phase difference in two magnetic fields, and the magnetic field that eddy current produces is to lag behind the magnetic field that voice coil loudspeaker voice coil produces, and this eddy current magnetism just can make the motion of voice coil loudspeaker voice coil produce distortion and phase interference.In addition, eddy current magnetism also produces original static magnetic field in the T iron (being produced by permanent magnet) simultaneously and disturbs and modulation, so also makes the action of voice coil loudspeaker voice coil bring distortion and reduce the voice coil loudspeaker voice coil operating efficiency.
Therefore, do not reduce the magnetic flux magnetic gap in as long as lower the eddy current in the T iron effectively, just can make the loudspeaker enclosure raising, distortion also significantly reduces simultaneously.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of can reduce eddy current loss, improve the operating efficiency of voice coil loudspeaker voice coil and the moving-coil speaker of reduction phase distortion.
The said moving-coil speaker of the utility model is made up of the T iron 1 that has conducting magnetic column 6, magnet steel 2, voice coil loudspeaker voice coil 3, support 4 and cone 5, wherein is fixedly equipped with ferrite sheet 7 on the conducting magnetic column 6 of T iron 1; The height H of the height h of said ferrite sheet 7 〉=1/3 voice coil loudspeaker voice coil 3, the diameter D of the diameter d of said ferrite sheet 7 〉=1/2 conducting magnetic column 6, simultaneously≤the diameter D of conducting magnetic column 6; Said ferrite sheet 7 is one or more ferrite sheet, the cross-sectional area of the area summation of its ferrite sheet 7 〉=1/2 conducting magnetic column 6, simultaneously≤cross-sectional area of conducting magnetic column 6; The height of said conducting magnetic column 6 is lower than the height of magnet steel 2, and the height of ferrite sheet 7 is consistent with the height of voice coil loudspeaker voice coil 3 simultaneously.
Adopt the moving-coil speaker of the said structure of the utility model, though conducting magnetic column 6 internal resistances of original T iron 1 seldom, but owing to added the high internal resistance magnetic conduction of a slice ferrite at conducting magnetic column 6 tops, the coil of voice coil loudspeaker voice coil 3 is when high-frequency work, can improve the whole internal resistance of 6 pairs of dynamic eddy current of T iron 1 conducting magnetic column, thereby reduce the generation of eddy current.Under this structure, because the increase of permeability magnetic material, magnetic flux just improves in the magnetic gap.Because eddy current reduces and magnetic flux rises, the operating efficiency of voice coil loudspeaker voice coil 3 just rises greatly, and the distortion of audio frequency also descends simultaneously, and moving-coil speaker is not easy to produce the distortion phenomenon of " sound compression " like this.
Description of drawings
Fig. 1 is the structural representation of the said moving-coil speaker of the utility model;
Fig. 2 is a kind of structural representation of the said ferrite sheet 7 of the utility model;
Fig. 3 is the said magnet steel 2 of the utility model, voice coil loudspeaker voice coil 3 and conducting magnetic column 6 relative position figure.
Embodiment
Be described further below in conjunction with accompanying drawing.
As shown in Figure 1, the said moving-coil speaker of the utility model is made up of the T iron 1 that has conducting magnetic column 6, magnet steel 2, voice coil loudspeaker voice coil 3, support 4 and cone 5, wherein is fixedly equipped with ferrite sheet 7 on the conducting magnetic column 6 of T iron 1; The height H of the height h of said ferrite sheet 7 〉=1/3 voice coil loudspeaker voice coil 3, the diameter D of the diameter d of said ferrite sheet 7 〉=1/2 conducting magnetic column 6, simultaneously≤the diameter D of conducting magnetic column 6.Adopt the moving-coil speaker of the said structure of the utility model, because the internal resistance very little (less than ferrite) of the magnetic pole of soft iron such as wrought iron, silicon steel, pure iron, after being fixedly equipped with a slice ferrite sheet 7 on the conducting magnetic column 6 of T iron 1, can improve the internal resistance of the overall dynamics eddy current of conducting magnetic column 6, thereby reducing eddy current produces, strengthen the magnetic flux of voice coil loudspeaker voice coil 3, improve the operating efficiency of voice coil loudspeaker voice coil 3 greatly, reduce the distortion of audio frequency.
As shown in Figure 2, the said ferrite sheet 7 of the utility model can be made one or more ferrite sheet, the cross-sectional area of the area summation of its ferrite sheet 7 〉=1/2 conducting magnetic column 6, and the cross-sectional area of≤conducting magnetic column 6, adopt the ferrite sheet 7 of this structure also can improve the internal resistance of overall dynamics eddy current of the conducting magnetic column 6 of T iron 1, produce, strengthen the magnetic flux of voice coil loudspeaker voice coil 3 thereby reduce eddy current, improve the operating efficiency of voice coil loudspeaker voice coil 3 greatly, reduce the distortion of audio frequency.
As shown in Figure 3, in actual use, internal resistance for the dynamic eddy current that improves T iron 1 conducting magnetic column 6 end portions, can also adopt the height that the height of conducting magnetic column 6 is lower than magnet steel 2, after the height reduction with conducting magnetic column 6, reduce conducting magnetic column 6 eddy current and produce, itself can reduce the eddy current internal resistance, and then the height of ferrite sheet 7 accomplished the thickness consistent with the height of voice coil loudspeaker voice coil 3, and improve the operating efficiency of voice coil loudspeaker voice coil greatly, reduce the distortion of audio frequency.
Claims (4)
1, a kind of moving-coil speaker is made up of the T iron (1) that has conducting magnetic column (6), magnet steel (2), voice coil loudspeaker voice coil (3), support (4) and cone (5), it is characterized in that being fixedly equipped with ferrite sheet (7) on the conducting magnetic column (6) of T iron (1).
2, according to the said moving-coil speaker of claim 1, the height H that it is characterized in that height h 〉=1/3 voice coil loudspeaker voice coil (3) of said ferrite sheet (7), the diameter D of the diameter d of said ferrite sheet (7) 〉=1/2 conducting magnetic column (6), simultaneously≤the diameter D of conducting magnetic column (6).
3, according to the said moving-coil speaker of claim 2, it is characterized in that said ferrite sheet (7) is one or more ferrite sheet, the cross-sectional area of the area summation of its ferrite sheet (7) 〉=1/2 conducting magnetic column (6), simultaneously≤cross-sectional area of conducting magnetic column (6).
4, according to claim 1 or 2 said moving-coil speakers, it is characterized in that the height of said conducting magnetic column (6) is lower than the height of magnet steel (2), the height of ferrite sheet (7) is consistent with the height of voice coil loudspeaker voice coil (3) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201889215U CN201260240Y (en) | 2008-08-21 | 2008-08-21 | Loudspeaker with moving coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201889215U CN201260240Y (en) | 2008-08-21 | 2008-08-21 | Loudspeaker with moving coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201260240Y true CN201260240Y (en) | 2009-06-17 |
Family
ID=40774478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201889215U Expired - Fee Related CN201260240Y (en) | 2008-08-21 | 2008-08-21 | Loudspeaker with moving coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201260240Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102685653A (en) * | 2012-04-28 | 2012-09-19 | 歌尔声学股份有限公司 | Loudspeaker |
-
2008
- 2008-08-21 CN CNU2008201889215U patent/CN201260240Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102685653A (en) * | 2012-04-28 | 2012-09-19 | 歌尔声学股份有限公司 | Loudspeaker |
| CN102685653B (en) * | 2012-04-28 | 2015-04-22 | 歌尔声学股份有限公司 | Loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 Termination date: 20140821 |
|
| EXPY | Termination of patent right or utility model |